RE: CME --> SIP Trunk DTMF Issues

Joe,

You might give this a shot too:

dtmf-relay sip-notify rtp-nte on the dial-peer. I've needed this before when acting as the gateway between two asterisk boxes.

-ryan

-----Original Message-----
From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of Joe Astorino
Sent: Wednesday, September 30, 2009 12:59 AM
To: Cisco certification
Subject: OT: CME --> SIP Trunk DTMF Issues

Hey guys,

I have setup a basic VOIP system at home and am having an issue I have not
been able to solve yet. I am not into voice so much yet, just enough to get
things going :P Essentially, I have a 3725 running latest 12.4T code with
CME. That router has a SIP trunk to a telephony provider and I have 4 Cisco
phones here in the house running SCCP to the CME. All that works great. I
can place and receive calls, everybody is happy. The only issue is that
when I dial outside lines, my DTMF totally does not work AT ALL. The SIP
trunk terminates to an asterisk box, and I have been told I need to be using
standards based DTMF-Relay, which from what I can tell I am. Not sure if
this is a bug, or maybe if anybody else out there has seen this or has any
more information? Running a debug I can see that the DTMF is negotiated to
rtp-nte which from what I understand is the standard method. Thanks for any
leads...

relevant configurations...

Bono#sh ver | i 12.4
Cisco IOS Software, 3700 Software (C3725-ADVENTERPRISEK9-M), Version
12.4(15)T10, RELEASE SOFTWARE (fc3)

voice service voip
 allow-connections sip to sip
 no supplementary-service sip moved-temporarily
 no supplementary-service sip refer
 sip
  registrar server expires max 3600 min 3600
   localhost dns:<my hostname>
!
!
voice class codec 1
 codec preference 1 g711ulaw

dial-peer voice 3 voip
 description Outbound To SIP Trunk 10-Digits
 translation-profile outgoing prepend1
 destination-pattern [2-9]..[2-9]......
 voice-class codec 1
 voice-class sip dtmf-relay force rtp-nte
 session protocol sipv2
 session target sip-server
 dtmf-relay rtp-nte sip-notify
 clid strip name
 no vad

sip-ua
 retry invite 2
 retry register 10
 retry options 1
 timers connect 100
 registrar dns:sip.myISP.net expires 3600
 sip-server dns:sip.MyISP.net
  host-registrar

-- 
Regards,
Joe Astorino - CCIE #24347 R&S
Technical Instructor - IPexpert, Inc.
Cell: +1.586.212.6107
Fax: +1.810.454.0130
Mailto:  jastorino_at_ipexpert.com
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